The symptoms you mentioned poor sleep, brain fog, anxiety, mood swings, digestion issues, and low focus can happen due to many reasons, including mental stress, anxiety, depression, and also
vitamin deficiencies like
B12 or D3, or
thyroid problems.
It’s a good idea to get some basic tests done:CBC,
Vitamin B12, Vitamin D3,
TSH (thyroid), and blood
sugar. If reports are normal, these symptoms may be due to stress or anxiety, which can be treated with therapy, lifestyle changes, and sometimes medication.
Please consult a psychiatrist or physician for proper guidance.